00:05If you've got a question and you don't know where to go,
00:08Ask Nina for some help, cause she's got a science show.
00:11She makes sense of her senses, while helping all her fans,
00:14By doing her experiments, with potions and with bags.
00:17Touch her tongue, fingers, eyes, ears, nose.
00:23Nina and the neurons find out what you need to know.
00:26Nina and the neurons find out what you need to know.
00:30He helps us with our eyes, and Felix with our touch.
00:33Ollie sniffs our snows and sends some bells, she hears so much.
00:36But it's Ollie's brother, and he helps us with our taste.
00:38Then he does their neurons, and they're coming to your place.
00:41Touch her tongue, fingers, eyes, ears, nose.
00:48Nina and the neurons find out what you need to know.
00:50Nina and the neurons find out what you need to know.
00:53Oh, yeah!
00:59Achoo!
01:00Oh, hello!
01:02I'm just giving my lovely crystal collection a bit of a dust,
01:06but it's been a while since I've done it, so the dust is making me sneeze.
01:11I hear a beep, I see a flash.
01:13I wonder what they're going to ask.
01:22Hi, Nina!
01:23Hi, guys!
01:25We've got a question for you.
01:27Why do we get sleepy dust in our eyes?
01:29What a good question!
01:31Why do we get sleepy dust in our eyes?
01:33Now, some people call it sleep in our eyes.
01:36It's those little hard bits that we sometimes get in the corner, just here.
01:41Why don't you all come down to the lab,
01:43and we'll do some experiments to investigate.
01:45See you soon, Nina!
01:47Bye!
01:48Bye!
01:50Well, I'm going to need some help to answer this one,
01:52and I know just who to ask.
01:54OK, neurons, time to get to work!
01:56Mmm!
02:13Neurons are the ready, Nina!
02:16OK, today's question is why do we get sleepy dust in our eyes?
02:20Now, which neuron do you think will be most useful in helping us find the answer?
02:24Me!
02:25Me!
02:26Me!
02:26Me!
02:27Me!
02:27Me!
02:27Will it be Fabulous Felix?
02:30I can help so very much if you need the sense of touch.
02:34Will it be Beautiful Belle?
02:36I send messages to Brain from ear.
02:38If there's a sound, I'll help you hear.
02:40Will it be Lovely Look?
02:42For looking and seeing, day or night, I'll help you with your sense of sight.
02:47Will it be Awesome Ollie?
02:49If it's Pony or Withy, but you can't tell,
02:51my messages help your sense of snail.
02:53I am, or will it be Baby Bug?
02:55Salty, Salty, Bitter, or Sweet, I'm your Taste Buddy whenever you eat.
03:05It's Luke!
03:07Go Luke, go Luke, go Luke, go Luke, go Luke, go Luke...
03:14Cool, Nina. I'll be looking out to help ya.
03:19Today's question is why do we get sleepy dust in our eyes?
03:23Now, because sleepy dust is something we get in our eyes,
03:26look, our seeing neuron will be helping us today.
03:28But stand by, neurons. I have a feeling I may be needing help from all of you.
03:33Right, I need to get the lab ready before the experimenters arrive.
03:39Daniel likes pizza. His twin brother, Luke, loves swimming.
03:43But they both want to know about sleepy dust.
03:46So today, for one day only, Daniel and Luke become the experimenters.
03:55Hi, guys. Hi, Nina.
03:58Oh, welcome to my science lab. It's lovely to see you both.
04:02Now, your question is why do we get sleepy dust in our eyes?
04:05But why do you want to know?
04:06Because I woke up this morning and I had sleepy dust in my eyes.
04:10Where does it come from?
04:11Well, that's what we're going to try and find out.
04:14Because I get sleepy dust in my eyes too.
04:16And it does seem to be when I wake up in the morning.
04:19Oh, well, let's just check.
04:21OK, let's see if anyone's got any sleepy dust at the moment.
04:24So why don't you have a little feel?
04:27Nope, there's nothing there at all, Nina.
04:29Your eyes are sleepy dust free.
04:32You're right, Felix. I can't feel any sleepy dust.
04:35What about you guys?
04:36No, Nina.
04:38No. OK, so we only get sleepy dust when we wake up after a big sleep.
04:42And we can tell it's there because we can feel it.
04:44So I think we need to do some investigating to find out more.
04:48And for our first experiment, we're going to be using our senses.
04:51Whoop-whoop! A senses experiment! We're ready, Nina!
04:56OK, so here we have some jam, some mashed potato and some sand.
05:02So let's see if any of these feel like sleepy dust.
05:05Let's get our fingers in.
05:09Oh, does it feel like sleepy dust?
05:12No.
05:13No? It's a bit gooey, isn't it?
05:17Oh, so what does the mashed potato feel like?
05:21Slippery and squeaky.
05:23So what does the sand feel like?
05:26Quite hard. It's crunchy.
05:29So do you think this feels like sleepy dust?
05:32Yeah.
05:32Yeah, the little hard grains of sand feel a bit like sleepy dust.
05:37But how does it get in our eyes?
05:40Oh, I know another experiment.
05:42And it might help us find out more.
05:45Now what do you normally do with your eyes?
05:47See? Blink.
05:49Yeah.
05:50But there's something else you do with your eyes when you're very sad.
05:56Cry!
05:58Yes, you cry.
05:59And when you cry, tears come from your eyes.
06:02Now what do tears look like?
06:04Water.
06:05Yes.
06:06Would you see these beakers look like they're filled with water?
06:08Yes.
06:09Well, some are water and some are a clear chemical.
06:13So we need to put our safety goggles on.
06:15And I'm wearing protective gloves as well as I'll be handling the chemicals.
06:19Nina's been specially trained to do this.
06:21You should never try mixing things yourself at home.
06:25Okay.
06:29Can you see that?
06:31Something very strange is happening.
06:35It's got all thick.
06:38Thick and gloopy.
06:39That's amazing.
06:41Ooh.
06:43Okay, next up.
06:48Wow.
06:50That's brilliant.
06:51It's changing colour.
06:53Oh, that's definitely not like any water I've seen, Nina.
06:57That's because it's not water, Luke.
07:00This experiment has shown that just because some things are clear and look like water,
07:05doesn't mean they are.
07:06And that's just like tears.
07:08They look like water, but they have special salts in them to help keep our eyes clean.
07:13And to find out even more about sleepy dust, we need to find out lots more about tears.
07:19Chop an onion.
07:21Then there'll be lots of tears.
07:23We don't need to do that, bud.
07:24We just have to find somewhere really, really muddy.
07:28Let's go.
07:29Goggles off.
07:36Hmm, where do you think we're going today?
07:40Nina said we were going somewhere muddy.
07:43And muddy means messy.
07:46Hey guys, looks like we're here.
07:51Here we are.
07:53Have you guessed why we're here yet?
07:54No, Nina.
07:55Well, why don't we take a drive to find out?
07:59Come on, let's get in and don't forget to buckle up.
08:27It's a bit noisy.
08:30And a bit bouncy.
08:34And very messy too.
08:35Look at that wind stream.
08:43Oh, it's getting hard to see.
08:45There's so much mud.
08:47What do you think we could use to clean it off?
08:49Water.
08:50Great idea.
08:54We just squirt some water and put the wipers on.
09:03Well, the water and wipers are certainly doing the trick.
09:08That was brilliant, wasn't it?
09:10Yeah!
09:12And our eyes are a bit like a windscreen.
09:15There are lots of little things that float in the air that can get in our eyes, like dust.
09:19So all day long, our eyes make wet tears.
09:23And when we blink, we wipe the tears across our eyes and wash the dirt away.
09:27Just like the windscreen wipers.
09:30But what do tears have to do with sleepy dust?
09:34We don't know, Nina.
09:35Well, let's go back to the lab to do a final experiment.
09:38Maybe that'll help us see more clearly.
09:41Follow me.
09:44So your question was, why do we get sleepy dust in our eyes?
09:48And so far, we've discovered that although tears are clear, just like water,
09:53they have special salts in them which clean our eyes.
09:56And we've also learned that our eyes make tears all day long,
09:59which wipe across our eyes when we blink and keep them clean.
10:03But now we need to find out where sleepy dust comes from.
10:06So let's get experimenting!
10:08Yay!
10:09OK, now for this experiment, we're going to make something that's a bit like sleepy dust.
10:14And to do that, we're going to use another type of salt called Epsom salt.
10:18So let's take our Epsom salts and pour them into the warm water.
10:23And using our stirrer, give it a good stir.
10:31Very good.
10:32Now let's take our droppers and we'll put a little bit of this liquid onto our black paper here.
10:42OK, now let's use our fingers and spread the liquid out.
10:47Well done, guys.
10:48Now something amazing will happen.
10:54Can you see what's happening?
10:55It's turning into something.
10:57It's white.
10:58Yeah, it looks a bit white.
11:00It looks a bit like snowflakes, Nina.
11:03Oh, it does a bit look.
11:05But these are actually called crystals.
11:08Now let's use our magnifying glass and have a closer look.
11:14They look like little sparkles.
11:18They look like twinkle stars.
11:20Yeah.
11:20Now these crystals here, these have had longer to form and dry out and have scraped some of the crystals
11:29off.
11:30Now what do they feel like?
11:32Oh, goody.
11:33My turn.
11:34Crunchy?
11:39Spikey?
11:40Yeah, it's quite crunchy and crispy, just like sleepy dust.
11:49So your question was, why do we get sleepy dust in our eyes?
11:53And I think we've answered it.
11:55We discovered that our eyes make tears all the time.
11:58And as we blink, we wipe the tears over our eyes and this keeps our eyes clean during the day.
12:04But when we're sleeping at night, we don't blink.
12:07So the tears gather in the corners where they dry out and leave behind the special cleaning salts that are
12:14in our tears.
12:14And that's why sometimes there's sleepy dust or sleep in our eyes when we wake up.
12:20Oh, so I hope that's answered your question.
12:23Thanks, Nina.
12:24Bye.
12:25Oh, you're welcome.
12:26Bye.
12:32If you want to know more about the science that's all around us, go to the Nina section on the
12:36CBeebies website.
12:38Have fun.
12:42Lab coat on, Nina.
12:44Lab coat on, Ollie.
12:46Safety gloves on, Nina.
12:48Safety gloves on, Felix.
12:50And don't forget your goggles, Nina.
12:52Goggles are on, look.
12:53I think we're ready.
12:56We do experiments in the lab.
12:59In the lab.
13:00In the lab.
13:01In the lab.
13:03Bubbling experiments in the lab.
13:05In the lab.
13:06Go, Nina.
13:07Nina in the lab.
13:08In the lab.
13:09We save a puppet, steam and smoke.
13:11We need protection, don't we, folks?
13:14We always put our safety first.
13:19Shoobee doobee doobee doobee doobee doobee.
13:21We do experiments in the lab.
13:23In the lab.
13:24Go, Nina.
13:25Nina and...
13:25It's been a marvellous day.
13:27The sand really did feel like sleepy dust.
13:30I really enjoyed myself today.
13:33The smells coming from Nina's beakers were really wiffy.
13:37I've had a fabby day.
13:39Especially when the windscreen got really muddy and messy.
13:43And Nina had to clean it with the wipers.
13:46Ah, it's been such a great day, man.
13:50Those crystals looked amazing.
13:52Our day's been bursting with sensational experiments.
13:56I hope you've enjoyed it.
13:57See you soon.
13:58Bye.
13:58Bye.
14:00Bye.
14:01Nina in the lab.
14:02Nina in the lab.
14:03Nina in the lab.
14:04In the lab.
